A Design of Low Profile Broadband Omnidirectional Vertical Polarization Slot Antenna

In this paper, a vertically polarized slot antenna with an omnidirectional radiation pattern is proposed. The antenna is based on the hollow cylinder structure. The omnidirectional vertical polarization is realized by two horizontal slots along the side wall of closed hollow cylinder structure. The simulation results show that the slot antenna impedance bandwidth is of 48% (0.94GHz to 1.54GHz), at the same time, the gain variation in the horizontal plane is less than 2.5dB over the bandwidth (0.95-1.25GHz). At the same time, the height of this antenna is only 0.063 λ
max
, the designed antenna has much potential for its flush-mount capability.